could I have hurt the engine?

[burleybanshee]

I changed my mains the other day. Had 165 in the 30mm oko, (28 pwk knock offs). The plugs were wet and fouling after a ride. Tried putting in 160 and tightened to much and broke one. So i pulled them out and put in a 158 and did two wide out runs from 1st through 6th. As soon as I topped out in sixth stopped, turned around did it again and chopped it on second pass back. Pulled plugs and they were white. Didn't cut them down to see if I had smoke ring. Fired it up next morning with out choking, heard a little knock. Is thhis knock possibly just because its cold?

 

Brand new rebuilt with four hours of riding on motor. $mil/5mil rod, 795 pistons, 165 psi compression, +4 timing, running ms 103 fuel. V-force reeds. k&n filter, t5's.

 

Could I have severly damaged the motor/pistons where i would need to already replace pistons?

 

Second, it pulled great from bottom to top, but it didn't have that old feeling of hanging on for dear life. Would i notice a gain switching from t'5 to CPI's? I dune mostly, have +4 swinger, 15/41 gearing and 225 pounds?

[fastrthnu]

did ya notice any metal specs on the plugs? If 165 was to rich and 155 was the lowest you went thats not a big deal. You should have did 1 run and chopped with the 165 in before takin it all apart. Always tune on the rich side first. You need to chop the side. Looking at the top doesnt do you any good. And as far as power loss, I had the same problem, my clutch wasnt adjusted properly till I burned it out.